PartsTable
Technical Data Sheet
Download PDF

R44371D-03 — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

R44371D-03: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, seat_angle: 45.0 DEGREES, thread_class: 3B INTERNAL, connection_style: PLAIN (OPTIONAL END), special_features: WITH GASKET, style_designator: CAP. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-602-2525, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
R44371D-03
NSN: 4730-00-602-2525
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 50599 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV STRATOFLEX PRODUCT DIVISION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
seat_angle45.0 DEGREES
thread_class3B INTERNAL
connection_stylePLAIN (OPTIONAL END)
special_featuresWITH GASKET
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
surface_treatmentANODIZE OVERALL
nominal_thread_size0.375 INCHES INTERNAL IN
thread_pitch_diameters+0.3518 TO 0.3553 INCHES INTERNAL IN
thread_quantity_per_inch28 INTERNAL
thread_series_designatorUNJS INTERNAL
NSN4730-00-602-2525
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: R44371D-03 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: PLAIN (OPTIONAL END)
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CAP
•
THREAD PITCH DIAMETERS: +0.3518 TO 0.3553 INCHES INTERNAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/3,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
NOMINAL THREAD SIZE: 0.375 INCHES INTERNAL IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEPLAIN (OPTIONAL END)
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.375 INCHES NOMINAL IN
STYLE DESIGNATORCAP
THREAD PITCH DIAMETERS+0.3518 TO 0.3553 INCHES INTERNAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/3,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND INTERNAL
NOMINAL THREAD SIZE0.375 INCHES INTERNAL IN
SEAT ANGLE45.0 DEGREES
SPECIAL FEATURESWITH GASKET
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
R44371DSIZE03Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy R44371D-03?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is R44371D-03?
R44371D-03 is a CAP,TUBE.
What parts can replace R44371D-03?
There is 1 known substitute for R44371D-03: R44371DSIZE03. Substitute compatibility should be verified for your specific system.
What is the NSN for R44371D-03?
R44371D-03 is cataloged in the U.S. Government catalog under NSN 4730-00-602-2525. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — R44371D-03

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.